javascript function 2c for loops 2c linear time complexity

1
2function crossAdd(input) {
3    var answer = [];
4    for (var i = 0; i < input.length; i++) {
5        var goingUp = input[i];
6        var goingDown = input[input.length-1-i];
7        answer.push(goingUp + goingDown);
8    }
9    return answer;
10}
11// O(N) time complexity
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